Tested and working, but little noisy. I have a video up showing it works and the noise from it. It kinda sounds like a fridge compressor. It would be good for a spare unit on the cheap or maybe a project. It needs a good flushing of the impellor as it has some flaky rust in it from the old boiler it was hooked to. I am not accepting returns. I have proof in video format of it working, so if theres a issue..its on you and your installation!.